In Silicon Valley, we’re told that every founder needs a cofounder. But is it true?
Y Combinator Co-Founder Paul Graham puts “Single Founder” as his number one reason that startups fail.
“What’s wrong with having one founder? To start with, it’s a vote of no confidence. It probably means the founder couldn’t talk any of his friends into starting the company with him. That’s pretty alarming, because his friends are the ones who know him best.”
“But even if the founder’s friends were all wrong and the company is a good bet, he’s still at a disadvantage. Starting a startup is too hard for one person. Even if you could do all the work yourself, you need colleagues to brainstorm with, to talk you out of stupid decisions, and to cheer you up when things go wrong.”
YC and many other venture capital firms have implemented Graham’s philosophy: approximately 10% of YC companies have solo founders. Some accelerator programs mandate cofounders or reject applications.
The question becomes: why do we celebrate tech CEOs as visionary leaders while simultaneously enforcing a “two-person rule” for company formation?
Cofounders can be transformative when properly matched — when there’s genuine trust and complementary strengths. Quality cofounders mitigate cognitive biases, provide perspective on pivoting decisions, and share the emotional demands of building. They also accomplish significant work.
However, Graham’s doctrine overlooks two critical factors: the risks of incompatible cofounders and alternative methods for building strong teams.
Consider forced cofounding arrangements — partnerships formed after brief meetings without substantive conversations about goals, conflict resolution, or decision-making approaches. Even carefully structured arrangements involving collaboration, pre-mortems, and trial periods frequently fail, yet the costs remain substantial: surrendering half the company before operations begin, plus the disruption of an eventual breakup.
Nearly 20% of unicorns were founded by solo entrepreneurs. These founders invested energy in customer discovery, product-market fit, and team-building on their schedule rather than months searching for cofounders. They recruited their second-in-command later, after establishing foundations, resulting in lower equity costs.
Without an obvious partner, forgo the search. Venture validation doesn’t require cofounders — it requires traction.
Engage potential customers about their challenges until consistently finding individuals eager to purchase a non-existent product. Assemble teams offering smaller equity stakes. Cultivate cofounding-style relationships with key team members when circumstances and vision align, not because industry convention demands it.
About Purpose Built
Purpose Built venture studio supports founders with ideas, coaching, resources and capital to turn good ideas into great companies. Focus areas include fintech, upskilling, and the future of work — positioned as the best early-stage partner for solo founders.
Email at start@purposebuilt.vc to learn more about how we support solo founders in building traction.